After FFVI (FFIII US), Square had its employees work on a 3-D graphics demo to hone their three-dimensional artistry. They produced the FF SGI demo. The FF SGI Demo featured FFVI's Locke, Terra, and Shadow and ran only on high-powered Silicon Graphics workstations. The game was uniquely controlled through a series of mouse movements (for example, moving the mouse in a star shape summoned a dragon). It was assumed that the FF SGI demo showed what the new N64 FF would look like, but Square stunned the gaming world when they announced FFVII would be for the PlayStation instead.